package com.haoze.common.utils;

import com.alibaba.fastjson.JSONObject;
import org.springframework.http.*;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.Collections;
import java.util.Map;

/**
 * @author luy
 * @date 2019/11/6 16:34
 */
public class HttpClientUtil {

    public static JSONObject sendPost(String url, Object map) {
        HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();
        factory.setConnectionRequestTimeout(3000);
        factory.setConnectTimeout(5000);
        RestTemplate restTemplate = new RestTemplate(factory);
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        HttpEntity<Object> request = new HttpEntity<>(map, headers);
        ResponseEntity<String> response = restTemplate.postForEntity(url, request, String.class);
        JSONObject result = JSONObject.parseObject(response.getBody());
        return result;
    }

    public static JSONObject sendGet(String url,Map map) {
        HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();
        factory.setConnectionRequestTimeout(3000);
        factory.setConnectTimeout(5000);
        RestTemplate restTemplate = new RestTemplate(factory);
        HttpHeaders headers = new HttpHeaders();
        headers.setAccept(Collections.singletonList(MediaType.APPLICATION_JSON));
        HttpEntity<String> entity = new HttpEntity<>("parameters", headers);
        ResponseEntity<String> response = restTemplate.exchange(url, HttpMethod.GET, entity, String.class,map);
        JSONObject result = JSONObject.parseObject(response.getBody());
        return result;
    }

    public static String sendPostByJson(String url, String param) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            URLConnection conn = realUrl.openConnection();
            // 设置通用的请求属性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 获取URLConnection对象对应的输出流
            out = new PrintWriter(conn.getOutputStream());
            // 发送请求参数
            out.print(param);
            // flush输出流的缓冲
            out.flush();
            // 定义BufferedReader输入流来读取URL的响应
            in = new BufferedReader(
                    new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送 POST 请求出现异常！"+e);
            e.printStackTrace();
        }
        //使用finally块来关闭输出流、输入流
        finally{
            try{
                if(out!=null){
                    out.close();
                }
                if(in!=null){
                    in.close();
                }
            }
            catch(Exception ex){
                ex.printStackTrace();
            }
        }
        return result;
    }
}
